Change-speed gearing for engine-lathes.



No. 895,106. PATENTED A'Ufk. 1908.

. A. E. NB TOfi. CHANGE SPEED GEARING FOR 211mm LATHES.

' APPLIGATIOH YILIJD NOV. H, 190-}.

3 SZZEETS-SKEE'I I PA'TBXTED 4,, 190's.

A. E. NEWTON. v CHANGE SPEED GEARING FOR ENGINE LATHES.

will.

-this invention thereto.

Uh rrED CHANGE-SPEED GE ARING Application filed November 11, 1904. s'eriain'u. 232,319.

change speed gearing for metal turning,

iathes.

.'lhe especial object 'of this invention is to provide an engine lathe m which the lathe 'spindle may be driven by means of strong,

siniple and etlicient change speed gearing.

0 these ends, this invention consists of the engine lathe and hi the combinations of parts therein as hereinafter described and more particnlartv pointed out in the claims at. the end of this specification.

In the accompan;,'ingthree sheets of; drawings, Figure 1 is a side view partlybroken away of sullicient parts of a lathe 4 heathstock to illustrate the application of Fig.2 is a rear view of the same. Fig. 3 is an end view thereof. big. t is a. diagrammatic sectional plan view showing the trains of geaiin; or driving the head stock spindle, and Figs. :3 to 12 inclusive are diagrannmitie views illustrating dilierent relative positions oi the controlling handles which produce 'diil'crent relative speeds.

tn the use of the ordinary metal turning lath'es the speed of rotation of the head stock spindle is varied b v a. shilling belt which runs on cone pulleys :nuunled respectively in the hcad-stock of the lathe and on the counter-shaft.

In addition to the use f ne pulleys the head-stock of an cngim iailze is usually provided with back gears hirir are thrown into mesh when the. head stock spindle iS it) be driven at still slower spelt-"ls than can be done directl from the cone pn ey drive.

in the ordinarvt'orm of engine lathe, how ever, the primary speed change of the head stock spindle is secured by a cone pulley drive. in practice the use f a cone pulley drive for an engine lathe is obiec'tionable for the reason that the driving )elt'is a)t to have its greatest degree of slippage an will act in the least etlicient manner at times when greatest power is required. For example, when the head stock spindle is to be STATES A LBERT E. NEWTON, OF WORCESTER, MASSACHUSETTS.

Specification of Letters Patent: I

PATENT OFFICE.

FOR ENGINE-LATHES.

Patented Aug. 4, 1908.

driven at high speed, the driving belt. i shifted to a cone pulley section of smallc -t diameter. At this time, although to driw. the spindle at this hi h speed, the greatest amount of power will he required, \'ct, nasmuch as the driving belt runs on the section of smallest diameter of the cone pulley, it will have the least, wrap or theleast surface of engagement, so that. it will be the most liable to sli )page of all positions to which it may be shiited.

The especial object of my present invention is to provide a reliable drive for the head stock spindle of an engine lathe which will eliminate the factor of slippage of the driving belt and which will secure ditl'crent speeds of the head steel: spindle by means of trains of spur gt ars, the driving belt of (he lathe being always maintained upon a single driving pulley and not requiring shitting when the speeit'of the head stock spindle is changed.

in the special form of engine lathe whic-hl have herein illustrated the head stock casting is pro ided with bearings for the head stock spindle for a primary driving shaft and for an internwdiate shaft. 'lwo trains of gears are employed between the primary driving shal't. and a sleeve mounted upon the head stock spindle. tion four speed changes may be obtained for the sleeve on the head stock spindle.

The slee e of the head stock spindle is provided with a clutch mechanism for making direct connection with the head stock spindle, and is also provided with a gearing for making connection with the head stock spindle through a front train of gears wh ch.

I secure the same effect as the ordinary l 3 gears of a lathe, so that in the complete int i eight changes of speed may be obtained to.

the head-stoek sp ndle, these. changes being cotttt'ulltd by a set of three levels.

Referring to the accompanying drawings for a detail description of a. head :Loek spindle constructed according to this invention, as shown in Figs. 2 and 3, an engine lathe embodying this invention comprises the lathe bed or casting B which may be supported on the legs L in the usual manner? The lathe bed'B is'provided with the. usual ways or guides, and fastened on the lathe bed B is the headstock casting li.-

Journaled in the head stock casting ii which serves as a support for the gearing and which is at the rear of the machine is a pri- By means of this construe:

i t l l l i l l l i l mary driving shaft having a pulley 11 which receives the main driving belt. The pulley 11 runs at constant speed at all times during the operation of the lathe, and the ions 13 and 14, and inwardly facing friction clutch members which may be alternately engaged with the primary driving shaft by means of the operating-piece 15, which operating piece 15 may be moved back and forth by an ordinary fork which may extend up from a shaft 16, the shaft 16 as shown most clearly in Fig. 3, being provided with a shifting handle 17.

Meshing with and driven from the gears 13 and 14 are gears 18 and 19 which are secured upon the intermediate shaft 12, which -rnterrnediate shaft 12 is journaled in bearings in the head stock casting.

Meshing with and driven from the gears 18 and 19 of the intermediate shaft 1'2 are gears 20 and .21 which are carried by clutch pieces loosely mounted upon the sleeve 23 of theshaft M to be driven which in the present instance is the head stock spindle of a metal turning lathe.

Mounted between the clutch pieces which carry the gee. JO-and '21 is an operating piece 22 which may be oierated from the usual fork extending up irom a sleeve 24 shown in Fig. 3, which sleeve 24 carries the handle 25.

. Near its forward end the sleeve .23 is provided with a gear 26 which meshes with and drives 2. ar 27 upon the slowing down shaft 28, whic slowin down shaft 28 is provided at its other en with a pinion 29 which meshes wit-h and drives a large gear: 30 u on the driven shaft or head stock spindle h The sleeve 23 is provided at its extreme forward end with a friction clutch 31, and the ear 30 is. rovided on its inner face with g P clutch teet cooperatins with the frictio'n. clutch 31 and the clutch teeth of the gear'30 is an operating piece 32 which may be operated from a fork extending up from the shaft 33, which shaft 33 is provided with a controlling handle 34.

' By means of this construction it will be seen that there are two trains of earingbetween the primary driving sha t and the sleeve on the head stock spindle, which trains of gearing are provided with cont-rolling levers so that by setting said controlling levers to different )ositions four speed changes for the speed of the head-stock spindle may be secured; while by'the use of a third controlling lever a direct connection can be secured between the head stock spindle and its sleeve,

or a connection mav be secured which will correspond to the effect of the ordinary back gears of an engine lathe. thus making eight us the total number of speed changes of an cngiuc lathe constructed according to this 7 embodiment of the invention.

The position of the controlling handles to secure these eight speed changes are illustratcd in Figs. 5 to 1'2 inclusive; the osition of the controlling handles in Fig. 5 ilustrat- 7'5 ing 1 the adjustment tosecure the hi hest speed of the head stock spindle; and Figs. 6 to 1'. inclusive illustrating successive adjustments to secure successively slower speeds for the head stock spindle. 30

'.\t its end the driven shaft or head stock spindle .\I may be provided with the usual face. plate F and center C, and at its other end the head stock spindle may be provided with a gear 35 which either through a single inter." 5 mediate 36 or two intermediates 36 and 37 may be connected to drive a gear 38 which; forms part of the feed train of the lathe.

From the shaftof the gear 38 connectionss 3 ma be made to drive either the feed-rod R" 9a an lead-screw S of the lathe, said connecy tions preferably com prising primary and seci ondary speed changing trains which may be a; controlled by the handles 39 and 40 rcspec Lively. 9

It is to he understood, however, that in this application for patent I do not wish to claim any particular change gearing connections between the head stock spindle and the lead-screw or feed-rod of the lathe, although in the drawings I have shown in part the. arrangement of change speed gearing which is covered in an application for patent filed by mo August 19, i904, Serial No. 221,330.

I am aware that numerous changes may be 015 made by skilled mechanics in practicing my invention without. departing from the S00 0' thereof as expressed in the claims, and I 0 not wish, therefore, to be limited to the par-' ticular construction I have herein shown and 116 described, nor to the use of my invention in connection with anygpartic-ular speed chan ing connections for the lead-screw or fee rod, hut

What I do claim and desire to secure by 1 Letters Patent of the United States is:-

1. In a speed changing device, a drivin shaft, an intermediate shaft, variable spec caring for driving the intermediate shaft mm the driving shaft, 0. spindle shaft, a 9 sleeve loosel mounted thereon, operativa' connections etween the sleeve and s indie; shaft, and a pluralityof ears of di erent. diameters. on the sleeve, ilisposedbetween the sleeve and intermediate 'shaftirnd con-@ nected with the intermediate shaftto be driven thereby. 6 2. In a speed changing dsvicega drlvin' =5 shaft, an intermediate shaftfvalriable'speii. connections for driving the inter-met iatl shaft from the driving shaft, 11 spindle shaft, a sleeve loosely mounted thereon, variable s eed connections between the spindle shaft a fifslc'eve; andwarishle speed connections -including a plurality of gears of difl'erent diengagement with said shaft, an intermediate shaft, gears fixed thereon and in constant ongagemcnt with the said ears on the driving shaft, :1 spindle shaft, 21 sl eeve loosely mount 15 ed thereon, means for operatively connecting the sleeve and s .ll1(lll3 shaft, and variable s eed gearing including a lurality of ears 0 different diameters on t e sleeve and disposed between the sieeve and intermediate shaft and connected with the intermediate shaft:

4. In a speed changing device, a driving shaft, a plurality of gears of different diameters loosel 'mounted thereon, an intermediate shaft, of pl urality of gears of different diame:

' 'ters fixed thereon and in constant en agement with the gears on the driving shaft, means for selectively connecting the gears on the driving shaft operatively therewith, a

80 spindle shaft, a sleeve thereon, driving connections between the spindle shaft and sleeve rand variable speed gearing between the sleeve and intermediate shaft including a plurality of gears of different diameters on 85 the sleeve meshing with the. gears on the in- I termediatc shaft.

5. In re speed changing device, a driving shaft, two gears of different diameters loosely mounted t ereon, a clutch for selectively 40connecting dither of said gears operatively with the driving shaft, an intermediate shaft, ,two gears of different diameters fixed thereon and in'constantengagement with said ears on the driving shaft, a spindle shaft, a sleeve loosely inpunted thereon, operative connections between the sleeve and spindle shaft, and variable speed gearing including a plurality of ears of different diameters on the sleeve and between the sleeve and intermediate shaft and adapted to receive power from the intermediate shaft.

6. In a change-s lee-d gearing, the combination of a shaft to' e driven, a driving shaft, a sleeve concentric with the driven shaft, two

- 56 trains of driving gears between the primary driving shaft and the sleeve, means for connecting the trains to secure four speed changes of the sleeve, and means for securing a direct connection between the sleeve and 60 the driven shaft:

7. In a change-speed gearing, the combi nation of a support, driven shaft journaled -therein, a rimary driving shaft and an inter- 'mediate s iaft also journaled in the support,

66 two sets of gears and two clutches for con nect-ing the primary driving shaft to the intermediate shaft, a sleeve on the driven shaft, two gears and two clutches for connccting the intermediate shaft gears to the sleeve, a train of gears corresponding to them back gears of an ordinary lathe and means for directly connecting the sleeve to the driven shaft or for connecting the same to said train of gears.

8f In a change-speed gearing, the combination of a drivcn-snaft, a loose gear thereon, a primary driving shaft, an intermediate shaft, a sleeve on the driven shaft, two sets of gears and two clutches connecting the primary driving shaft \\'ilh the intermediate 30 shaft, a single operating piece for setting both of said clutches, two gears and two clutches connecting the. intermediate shaft gears with thcslecve, a single operating piece for setting both of the last named clutches, 5 a hack-gear drive comprising a parallel shaft and gear connection between the sleeve and the loose gear upon the driven shaft, a fric tion clutch between the sleeve and the-driven shaft, and a single operating piece for making a positive clutch connection between the loose gear and driven shaft, and for setting the friction clutch to directly connect the sleeve and the driven shaft."

9. In a changc-spced gearing, the comhi- 5 nation of a driven shaft, :1 sleeve thereon, a. primary driving shaft, an intermediate shaft, two sets of gears and two clutches connecting the primary shaft with the intermediate shaft, a single operating piece for setting 0 both of said clutches, two gears and two clutches connecting the intermediate shaft gears and the sleeve, a single operating piece for the last two named clutches, a train of back gearing, a friction clutch for making direct connection between the sleeve and the driven shaft, a single operating piece for the friction clutch and for making a positive clutch connection with the train of back gearing, and three independent levers for n'mnipulating the said three operating pieces.

10. In a change speed gearing, the combination of two shafts, a shaft intermediate thereof, a series of gear wheels mounted on v the intermediate shaft adapted to rotate in unisoi! and prevented from longitudinal movement thereon, one of the first named shafts being geared to said gears, a sleeve on the other of said first named shafts, gears on said'sleeve arranged to mesh with the gear wheels on the intermediate shaftand means for connecting the sleeve to rotate with, and disconnecting it from, the shaft on which it is mounted.

11. ,In a change speed gearing, the eombi nation of a driving shaft, a driven shaft, an intermediate shaft, gears on said intermediate shaft adaptcd to rotate in unison and prevented from lon itudinal movement, a}

sleeve on the driven shaft, a series of gears on 133' 

